chore(deps): update dependency react-apollo to v2.5.4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
react-apollo	devDependencies	patch	2.5.3 -> 2.5.4	source

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Release Notes

apollographql/react-apollo

### [`v2.5.4`](https://togithub.com/apollographql/react-apollo/blob/master/Changelog.md#​254-2019-04-05) [Compare Source](https://togithub.com/apollographql/react-apollo/compare/v2.5.3...v2.5.4) ##### Bug Fixes - Fixes `Could not find "client" in the context of ApolloConsumer` errors when using `MockedProvider`.
[@​hwillson](https://togithub.com/hwillson) in [#​2907](https://togithub.com/apollographql/react-apollo/pull/2907) - Ensure `Query` components using a `fetchPolicy` of `no-cache` have their data preserved when the components tree is re-rendered.
[@​hwillson](https://togithub.com/hwillson) in [#​2914](https://togithub.com/apollographql/react-apollo/pull/2914) ##### Improvements - Documentation updates.
[@​afenton90](https://togithub.com/afenton90) in [#​2932](https://togithub.com/apollographql/react-apollo/pull/2932)

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